ArcEngine开发之自定义工具栏--地图放大、缩小（C#）

1、放大命令实现

创建GIS类，选择Base Command模版，类的名称为ZoomIn，选择第2类：ArcMap MapControl or PageLayoutControl command

该类的源代码为：

using System;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.ADF.CATIDs;
using System.Runtime.InteropServices;

namespace GIS
{
	[ClassInterface(ClassInterfaceType.None)]
	[Guid("2C214724-BFA2-4e8c-BC5D-775C67FA6F51")]

	public class ZoomIn : ICommand, ITool
	{
        #region COM Registration Function(s)
        [ComRegisterFunction()]
        [ComVisible(false)]
        static void RegisterFunction(Type registerType)
        {
            // Required for ArcGIS Component Category Registrar support
            ArcGISCategoryRegistration(registerType);

            //
            // TODO: Add any COM registration code here
            //
        }

        [ComUnregisterFunction()]
        [ComVisible(false)]
        static void UnregisterFunction(Type registerType)
        {
            // Required for ArcGIS Component Category Registrar support
            ArcGISCategoryUnregistration(registerType);

            //
            // TODO: Add any COM unregistration code here
            //
        }

        #region ArcGIS Component Category Registrar generated code
        /// 

        /// Required method for ArcGIS Component Category registration -
        /// Do not modify the contents of this method with the code editor.
        /// 
        private static void ArcGISCategoryRegistration(Type registerType)
        {
            string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
            ControlsCommands.Register(regKey);

        }
        /// 

        /// Required method for ArcGIS Component Category unregistration -
        /// Do not modify the contents of this method with the code editor.
        /// 
        private static void ArcGISCategoryUnregistration(Type registerType)
        {
            string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
            ControlsCommands.Unregister(regKey);

        }

        #endregion
        #endregion
		[DllImport("gdi32.dll")]
		static extern bool DeleteObject(IntPtr hObject);

		private System.Drawing.Bitmap m_bitmap;
		private IntPtr m_hBitmap;
		private IHookHelper m_pHookHelper;
		private INewEnvelopeFeedback m_feedBack;
		private IPoint m_point;
		private Boolean m_isMouseDown;
		private System.Windows.Forms.Cursor m_zoomInCur;
		private System.Windows.Forms.Cursor m_moveZoomInCur;

		public ZoomIn()
		{
			//Load resources
			string[] res = GetType().Assembly.GetManifestResourceNames();
			if(res.GetLength(0) > 0)
			{
				m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomIn.bmp"));
				if(m_bitmap != null)
				{
					m_bitmap.MakeTransparent(m_bitmap.GetPixel(1,1));
					m_hBitmap = m_bitmap.GetHbitmap();
				}
			}
			m_pHookHelper = new HookHelperClass ();
		}
	
		~ZoomIn()
		{
			if(m_hBitmap.ToInt32() != 0)
				DeleteObject(m_hBitmap);
			
			m_pHookHelper = null;
			m_zoomInCur = null;
			m_moveZoomInCur = null;
		}

		#region ICommand Members

		public void OnClick()
		{
		}

		public string Message
		{
			get
			{
				return "zooms the Display In By Rectangle or Single Click";
			}
		}

		public int Bitmap
		{
			get
			{
				return m_hBitmap.ToInt32();
			}
		}

		public void OnCreate(object hook)
		{
            m_pHookHelper.Hook = hook;
            m_zoomInCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomIn.cur"));
            m_moveZoomInCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "MoveZoomIn.cur"));
		}

		public string Caption
		{
			get
			{
				return "Zoom In";
			}
		}

		public string Tooltip
		{
			get
			{
				return "Zoom In";
			}
		}

		public int HelpContextID
		{
			get
			{
				// TODO:  Add ZoomIn.HelpContextID getter implementation
				return 0;
			}
		}

		public string Name
		{
			get
			{
				return "Sample_Pan/Zoom_Zoom In";
			}
		}

		public bool Checked
		{
			get
			{
				return false;
			}
		}

		public bool Enabled
		{
			get
			{
				if(m_pHookHelper.FocusMap == null) return false;

				return true;
			}
		}

		public string HelpFile
		{
			get
			{
				// TODO:  Add ZoomIn.HelpFile getter implementation
				return null;
			}
		}

		public string Category
		{
			get
			{
				return "Sample_Pan/Zoom";
			}
		}

		#endregion
	
		#region ITool Members

		public void OnMouseDown(int button, int shift, int x, int y)
		{
			if(m_pHookHelper.ActiveView == null) return;

			//If the active view is a page layout
			if(m_pHookHelper.ActiveView is IPageLayout)
			{
				//Create a point in map coordinates
				IPoint pPoint = (IPoint) m_pHookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);

				//Get the map if the point is within a data frame
				IMap pMap = m_pHookHelper.ActiveView.HitTestMap(pPoint);

				if(pMap == null) return;

				//Set the map to be the page layout's focus map
				if(pMap != m_pHookHelper.FocusMap)
				{
					m_pHookHelper.ActiveView.FocusMap = pMap;
					m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
				}
			}
			//Create a point in map coordinates
			IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
			m_point = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);

			m_isMouseDown = true;

		}

		public void OnMouseMove(int button, int shift, int x, int y)
		{
			if(!m_isMouseDown) return;

			//Get the focus map
			IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;

			//Start an envelope feedback
			if(m_feedBack == null)
			{
				m_feedBack = new NewEnvelopeFeedbackClass();
				m_feedBack.Display = pActiveView.ScreenDisplay;
				m_feedBack.Start(m_point);
			}

			//Move the envelope feedback
			m_feedBack.MoveTo(pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y));
		}

		public void OnMouseUp(int button, int shift, int x, int y)
		{
			if(!m_isMouseDown) return;

			//Get the focus map
			IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;

			//If an envelope has not been tracked
			IEnvelope pEnvelope;

			if(m_feedBack == null)
			{
				//Zoom in from mouse click
				pEnvelope = pActiveView.Extent;
				pEnvelope.Expand(0.5, 0.5, true);
				pEnvelope.CenterAt(m_point);
			}
			else
			{
				//Stop the envelope feedback
				pEnvelope = m_feedBack.Stop();

				//Exit if the envelope height or width is 0
				if(pEnvelope.Width ==0 || pEnvelope.Height == 0)
				{
					m_feedBack = null;
					m_isMouseDown = false;
				}
			}
			//Set the new extent
			pActiveView.Extent = pEnvelope;
			//Refresh the active view
			pActiveView.Refresh();
			m_feedBack = null;
			m_isMouseDown = false;
		}

		public void OnKeyDown(int keyCode, int shift)
		{
			if(m_isMouseDown)
			{
				if(keyCode == 27)
				{
					m_isMouseDown = false;
					m_feedBack = null;
					m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewForeground, null, null);
				}
			}
		}

		public void OnKeyUp(int keyCode, int shift)
		{
			// TODO:  Add ZoomIn.OnKeyUp implementation
		}

		public int Cursor
		{
			get
			{
				if(m_isMouseDown)
					return m_moveZoomInCur.Handle.ToInt32();
				else
					return m_zoomInCur.Handle.ToInt32();
			}
		}
		
		public bool OnContextMenu(int x, int y)
		{
			// TODO:  Add ZoomIn.OnContextMenu implementation
			return false;
		}

		public bool Deactivate()
		{
			return true;
		}

		public void Refresh(int hdc)
		{
			// TODO:  Add ZoomIn.Refresh implementation
		}

		public void OnDblClick()
		{
			// TODO:  Add ZoomIn.OnDblClick implementation
		}

		#endregion
	}
}

 

调用：

ICommand command = new ZoomIn();
            command.OnCreate(m_mapControl.Object);
            ITool tool = command as ITool;
            axMapControl1.CurrentTool = tool;

 

 

2、缩小命令实现

创建GIS类，选择Base Command模版，类的名称为ZoomOut，选择第2类：ArcMap MapControl or PageLayoutControl command

该类的源代码为：

using System;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.ADF.CATIDs;
using System.Runtime.InteropServices;

namespace GIS
{
	[ClassInterface(ClassInterfaceType.None)]
	[Guid("03079006-888A-4691-941A-7B16F35E2C1E")]

	public class ZoomOut : ICommand, ITool
	{
        #region COM Registration Function(s)
        [ComRegisterFunction()]
        [ComVisible(false)]
        static void RegisterFunction(Type registerType)
        {
            // Required for ArcGIS Component Category Registrar support
            ArcGISCategoryRegistration(registerType);

            //
            // TODO: Add any COM registration code here
            //
        }

        [ComUnregisterFunction()]
        [ComVisible(false)]
        static void UnregisterFunction(Type registerType)
        {
            // Required for ArcGIS Component Category Registrar support
            ArcGISCategoryUnregistration(registerType);

            //
            // TODO: Add any COM unregistration code here
            //
        }

        #region ArcGIS Component Category Registrar generated code
        /// 

        /// Required method for ArcGIS Component Category registration -
        /// Do not modify the contents of this method with the code editor.
        /// 
        private static void ArcGISCategoryRegistration(Type registerType)
        {
            string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
            ControlsCommands.Register(regKey);

        }
        /// 

        /// Required method for ArcGIS Component Category unregistration -
        /// Do not modify the contents of this method with the code editor.
        /// 
        private static void ArcGISCategoryUnregistration(Type registerType)
        {
            string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
            ControlsCommands.Unregister(regKey);

        }

        #endregion
        #endregion

		[DllImport("gdi32.dll")]
		static extern bool DeleteObject(IntPtr hObject);
		private System.Drawing.Bitmap m_bitmap;
		private IntPtr m_hBitmap;
		private IHookHelper m_pHookHelper;
		private INewEnvelopeFeedback m_feedBack;
		private IPoint m_point;
		private Boolean m_isMouseDown;
		private System.Windows.Forms.Cursor m_zoomOutCur;
		private System.Windows.Forms.Cursor m_moveZoomOutCur;

		public ZoomOut()
		{
			//Load resources
			string[] res = GetType().Assembly.GetManifestResourceNames();
			if(res.GetLength(0) > 0)
			{
				m_bitmap = new System.Drawing.Bitmap(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomOut.bmp"));
				if(m_bitmap != null)
				{
					m_bitmap.MakeTransparent(m_bitmap.GetPixel(1,1));
					m_hBitmap = m_bitmap.GetHbitmap();
				}
			}
			m_pHookHelper = new HookHelperClass ();
		}

		~ZoomOut()
		{
			if(m_hBitmap.ToInt32() != 0)
				DeleteObject(m_hBitmap);
			
			m_pHookHelper = null;
			m_zoomOutCur = null;
			m_moveZoomOutCur = null;
		}
	
		#region ICommand Members

		public void OnClick()
		{
		}

		public string Message
		{
			get
			{
				return "Zooms the display out by rectangle or single click";
			}
		}

		public int Bitmap
		{
			get
			{
				return m_hBitmap.ToInt32();
			}
		}

		public void OnCreate(object hook)
		{
			m_pHookHelper.Hook = hook;
            m_zoomOutCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "ZoomOut.cur"));
            m_moveZoomOutCur = new System.Windows.Forms.Cursor(GetType().Assembly.GetManifestResourceStream(GetType(), "MoveZoomOut.cur"));
		}

		public string Caption
		{
			get
			{
				return "Zoom Out";
			}
		}

		public string Tooltip
		{
			get
			{
				return "Zoom Out";
			}
		}

		public int HelpContextID
		{
			get
			{
				// TODO:  Add ZoomOut.HelpContextID getter implementation
				return 0;
			}
		}

		public string Name
		{
			get
			{
				return "Sample_Pan/Zoom_Zoom Out";
			}
		}

		public bool Checked
		{
			get
			{
				return false;
			}
		}

		public bool Enabled
		{
			get
			{
				if(m_pHookHelper.FocusMap == null) return false;

				return true;
			}
		}

		public string HelpFile
		{
			get
			{
				// TODO:  Add ZoomOut.HelpFile getter implementation
				return null;
			}
		}

		public string Category
		{
			get
			{
				return "Sample_Pan/Zoom";
			}
		}

		#endregion
	
		#region ITool Members

		public void OnMouseDown(int button, int shift, int x, int y)
		{
			if(m_pHookHelper.ActiveView == null) return;

			//If the active view is a page layout
			if(m_pHookHelper.ActiveView is IPageLayout)
			{
				//Create a point in map coordinates
				IPoint pPoint = (IPoint) m_pHookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);

				//Get the map if the point is within a data frame
				IMap pMap = m_pHookHelper.ActiveView.HitTestMap(pPoint);

				if(pMap == null) return;

				//Set the map to be the page layout's focus map
				if(pMap != m_pHookHelper.FocusMap)
				{
					m_pHookHelper.ActiveView.FocusMap = pMap;
					m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
				}
			}
			//Create a point in map coordinates
			IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;
			m_point = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);
			m_isMouseDown = true;
		}

		public void OnMouseMove(int button, int shift, int x, int y)
		{
			if(!m_isMouseDown) return;

			//Get the focus map
			IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;

			//Start an envelope feedback
			if(m_feedBack == null)
			{
				m_feedBack = new NewEnvelopeFeedbackClass();
				m_feedBack.Display = pActiveView.ScreenDisplay;
				m_feedBack.Start(m_point);
			}

			//Move the envelope feedback
			m_feedBack.MoveTo(pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y));
		}

		public void OnMouseUp(int button, int shift, int x, int y)
		{
			if(!m_isMouseDown) return;

			IEnvelope pEnvelope;
			IEnvelope pFeedEnvelope;

			double newWidth, newHeight;
			
			//Get the focus map
			IActiveView pActiveView = (IActiveView) m_pHookHelper.FocusMap;

			//If an envelope has not been tracked
			if(m_feedBack == null)
			{
				//Zoom out from the mouse click
				pEnvelope = pActiveView.Extent;
				pEnvelope.Expand(2, 2, true);
				pEnvelope.CenterAt(m_point);
			}
			else
			{
				//Stop the envelope feedback
				pFeedEnvelope = m_feedBack.Stop();

				//Exit if the envelope height or width is 0
				if(pFeedEnvelope.Width == 0 || pFeedEnvelope.Height == 0)
				{
					m_feedBack = null;
					m_isMouseDown = false;
				}

				newWidth = pActiveView.Extent.Width * (pActiveView.Extent.Width / pFeedEnvelope.Width);
				newHeight = pActiveView.Extent.Height * (pActiveView.Extent.Height / pFeedEnvelope.Height);

				//Set the new extent coordinates
				pEnvelope = new EnvelopeClass();
				pEnvelope.PutCoords(pActiveView.Extent.XMin - ((pFeedEnvelope.XMin - pActiveView.Extent.XMin) * (pActiveView.Extent.Width / pFeedEnvelope.Width)), 
					pActiveView.Extent.YMin - ((pFeedEnvelope.YMin - pActiveView.Extent.YMin) * (pActiveView.Extent.Height / pFeedEnvelope.Height)),
					(pActiveView.Extent.XMin - ((pFeedEnvelope.XMin - pActiveView.Extent.XMin) * (pActiveView.Extent.Width / pFeedEnvelope.Width))) + newWidth,
					(pActiveView.Extent.YMin - ((pFeedEnvelope.YMin - pActiveView.Extent.YMin) * (pActiveView.Extent.Height / pFeedEnvelope.Height))) + newHeight);
			}

			//Set the new extent
			pActiveView.Extent = pEnvelope;

			//Refresh the active view
			pActiveView.Refresh();
			m_feedBack = null;
			m_isMouseDown = false;
		}

		public void OnKeyDown(int keyCode, int shift)
		{
			if(m_isMouseDown)
			{
				if(keyCode == 27) //ESC key
				{
					m_feedBack = null;
					m_isMouseDown = false;
					m_pHookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewForeground, null, null);
				}
			}
		}

		public void OnKeyUp(int keyCode, int shift)
		{
			// TODO:  Add ZoomOut.OnKeyUp implementation
		}

		public int Cursor
		{
			get
			{
				if(m_isMouseDown)
					return m_moveZoomOutCur.Handle.ToInt32();
				else
					return m_zoomOutCur.Handle.ToInt32();
			}
		}

		public bool OnContextMenu(int x, int y)
		{
			// TODO:  Add ZoomOut.OnContextMenu implementation
			return false;
		}

		public bool Deactivate()
		{
			return true;
		}

		public void Refresh(int hdc)
		{
			// TODO:  Add ZoomOut.Refresh implementation
		}

		public void OnDblClick()
		{
			// TODO:  Add ZoomOut.OnDblClick implementation
		}

		#endregion
	}
}

 

调用：

ICommand command = new ZoomOut();
            command.OnCreate(m_mapControl.Object);
            ITool tool = command as ITool;
            axMapControl1.CurrentTool = tool;

注：希望与大家分享下自己查找到的或者自己修改后的代码，新手学习，若有错误欢迎批评指正！